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Note 14 - Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2012
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] |
|  | Years Ended December 31, |
|  | 2012 |  |  | 2011 |  |  | 2010 |
Shares awarded to each non-employee director |  |  | 5,155 |  |  |  | 3,418 |  |  |  | 3,147 |
Total shares awarded |  |  | 30,930 |  |  |  | 20,508 |  |  |  | 25,176 |
Average grant-date market price per share |  | $ | 9.70 |  |  | $ | 14.46 |  |  | $ | 15.89 |
Total compensation cost attributable to shares awarded |  | $ | 300,000 |  |  | $ | 297,000 |  |  | $ | 400,000 |
Compensation cost recognized related to current and prior year awards |  | $ | 283,333 |  |  | $ | 194,667 |  |  | $ | 283,333 |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  | 2001 Plan |
|  | Shares |  |  | Weighted Average Exercise Price |
Outstanding at December 31, 2010 |  |  | 166,540 |  |  | $ | 14.85 |
Exercised |  |  | (20,333 | ) |  |  | 2.14 |
Expired/forfeited |  |  | (92,307 | ) |  |  | 24.12 |
Outstanding at December 31, 2011 |  |  | 53,900 |  |  |  | 3.77 |
Exercised |  |  | (24,400 | ) |  |  | 3.04 |
Expired/forfeited |  |  | (7,300 | ) |  |  | 9.35 |
Outstanding at December 31, 2012 |  |  | 22,200 |  |  |  | 3.08 |
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] |
|  | Options Outstanding |  | Options Exercisable
Range of Exercise Price per Share |  | Number of Shares |  | Weighted Average Remaining Contractual Life (Yrs.) |  | Weighted Average Exercise Price per Share |  | Number of Shares |  | Weighted Average Exercise Price per Share
$ | 3.05 – 3.10 |  | 22,200 |  | 1.30 |  | $ | 3.08 |  | 22,200 |  | $ | 3.08
Schedule of Share-based Compensation, Activity [Table Text Block] |
|  | Number of Shares |  |  | Aggregate Intrinsic Value |
Total outstanding and vested in-the-money options at December 31, 2012 |  |  | 22,200 |  |  | $ | 148,441 |
Total options exercised during 2012 |  |  | 24,400 |  |  | $ | 176,513 |
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] |
|  | Warrants Exercised |
|  | Shares |  |  | Company’s Proceeds from Exercise |  |  | Year-End Warrant Share Balance |
Warrants outstanding on January 1, 2010 |  |  | 314,412 |  |  | $ | 33,330 |  |  |  | 334,046 |
Warrants exercised in 2010 |  |  | 238,981 |  |  | $ | 358,471 |  |  |  | 75,431 |
Warrants exercised in 2011 |  |  | 75,431 |  |  | $ | 113,147 |  |  |  | -- |
Warrants exercised in 2012 |  |  | -- |  |  | $ | -- |  |  |  | -- |

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